2668145537 has 2 divisors, whose sum is σ = 2668145538. Its totient is φ = 2668145536.

The previous prime is 2668145531. The next prime is 2668145573. The reversal of 2668145537 is 7355418662.

Together with next prime (2668145573) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2547826576 + 120318961 = 50476^2 + 10969^2 .

It is a cyclic number.

It is not a de Polignac number, because 2668145537 - 2²⁸ = 2399710081 is a prime.

It is a super-2 number, since 2×2668145537² = 14238001213226036738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2668145491 and 2668145500.

It is not a weakly prime, because it can be changed into another prime (2668145531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334072768 + 1334072769.

It is an arithmetic number, because the mean of its divisors is an integer number (1334072769).

Almost surely, 2^2668145537 is an apocalyptic number.

It is an amenable number.

2668145537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668145537 is an equidigital number, since it uses as much as digits as its factorization.

2668145537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 47.

The square root of 2668145537 is about 51654.0950651543. The cubic root of 2668145537 is about 1386.9788491824.

The spelling of 2668145537 in words is "two billion, six hundred sixty-eight million, one hundred forty-five thousand, five hundred thirty-seven".